Abstract
Objective To explore the application value of external fixator in obsolete hip dislocation. Methods Retrospective analysis of 9 cases of obsolete hip dislocation treated with external fixator from January 2010 to January 2017. There were 6 males and 3 females, with an average of 32.0±8.3 years old (range 19-47). The time from injury to operation was 3-9 months, with an average of 6.2±1.9 months. The patient's limb shortening length, traction time, traction length, operation time, surgical bleeding volume, preoperative and last follow-up VAS score, Epstein score, D'Aubigne functional score were recorded. Results The length of the limb shortened 5-11cm, with an average of 6.7±2.0 cm. The preoperative traction time ranged 20-45 d, with an average of 26.9±8.2 d. The length of traction ranged 5-12 cm, with an average of 7.1±2.2 cm. The second reconstruction operation time was 2.0-4.0 hours, with an average of 2.8±0.7 h. The bleeding volume was 800-2 000ml, with an average of 1 216.7±422.8 ml. The Epstein score at the last follow-up was excellent in 4 cases, good in 4 cases and improved in 1 case. The preoperative VAS score and the final follow-up VAS score were 0.9±0.8 points and 4.6±0.9 points respectively. There was a significant difference between preoperative and postoperative VAS scores (t=8.981, P=0.000). The D'Aubigne functional scores of preoperative and final follow-up were 5.2±1.0 points and 13.1±2.0 points respectively and the difference was statistically significant (t=-12.044, P=0.000). Conclusion The external fixation in the treatment of obsolete dislocation of the hip is helpful and accepted in patients with femoral head dislocation. It is easy to carry and tract for patients and convenient for functional exercise. The external fixation makes operation simple and flexible; the traction force is strong and the effect of the femoral head reduction is obvious, the operation method is simplified and the quality of the reduction is improved. Key words: External fixator; Hip dislocation; Treatment outcome
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